866788526550056 has 48 divisors (see below), whose sum is σ = 1786634115174720. Its totient is φ = 393944952711200.

The previous prime is 866788526549987. The next prime is 866788526550173. The reversal of 866788526550056 is 650055625887668.

It is a super-3 number, since 3×866788526550056³ (a number of 46 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48969440 + ... + 64277391.

It is an arithmetic number, because the mean of its divisors is an integer number (37221544066140).

Almost surely, 2^{866788526550056} is an apocalyptic number.

It is an amenable number.

866788526550056 is an abundant number, since it is smaller than the sum of its proper divisors (919845588624664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866788526550056 is a wasteful number, since it uses less digits than its factorization.

866788526550056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113254766 (or 113254751 counting only the distinct ones).

The product of its (nonzero) digits is 5806080000, while the sum is 77.

The spelling of 866788526550056 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, five hundred fifty thousand, fifty-six".